<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>07_盒子模型边框与内间距</title>
    <style>
        .z1{
            width: 200px;
            height: 200px;
            background-color: red;
            border: 10px solid blue;
            border-bottom: 15px dotted yellow;
            margin-bottom: 10px;
        }
        .z2{
            width: 200px;
            height: 200px;
            background-color: lightpink;
            border-radius: 5px;
            margin-bottom: 5px;
        }
        .z3{
            width: 200px;
            height: 60px;
            background-color: lightskyblue;
            border-radius: 30px;
            margin-bottom: 10px;
        }
        .z4{
            width: 200px;
            height: 200px;
            background-color: lightcoral;
            border : 10px solid blue;
            padding: 20px;
            margin: 50px;
            box-sizing: border-box;
        }
    </style>
</head>
<body>
<div class="fu">
    <div class="z1"></div>
    <div class="z2"></div>
    <div class="z3"></div>
    <div class="z4"></div>

</div>
</body>
</html>